webpack3中使用postcss-loader和autoprefixer给css3样式添加浏览器兼容

npm install --save-dev css-loader style-loader

//sass-loader依赖于node-sass，所以还要安装node-sass
//postcss-loader autoprefixer postcss 处理浏览器兼容

npm install --save-dev sass-loader node-sass postcss-loader autoprefixer postcss

{
     test: /\.scss$/,
     exclude: /node_modules/,
     use: [ 
           ‘style-loader‘,
           {loader: ‘css-loader‘,options: {importLoaders: 2}},  //2代表css-loader后还需要几个loader
           {loader: ‘postcss-loader‘,options:{plugins:[require("autoprefixer")("last 100 versions")]}},
           ‘sass-loader‘
          ]
 }